Function assertArrayLength

examples/acceptance/ohlc-sample.ts:21–23

(label: string, arr: ReadonlyArray<unknown>, expected: number)

};

const assertArrayLength = (label: string, arr: ReadonlyArray<unknown>, expected: number): void => {
  assertEqual(`${label} length`, arr.length, expected);
};

// Helper to compare OHLC values (works for both tuple and object)
const assertOHLCEqual = (